It is possible for the feed system to have a low impedance, looking downstream from the pressure source at a certain frequency.
在压力源下游,供应系统在某一频率下可能有一低的阻抗。
Methods The related factor in personnel's pressure in self-control nursing was used, aiming at the pressure source adopt the appropriate counterplan and regulate.
方法自制护理人员压力相关因素调查表,针对压力来源采取适当对策及调节。
One source of error is refraction, the bending of light beams as they pass through air layers of different temperature and pressure.
误差的一个来源是折射,即光束通过不同温度和压力的空气层时发生的弯曲现象。
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